Flutter: popAndPushNamed with arguments passing to

问题:

I am writing an application on Flutter. I need to do popAndPushNamed but I also need to pass arguments to the Page I am pushing. How can I do? Is there another way to pop and push or I have to look for a different solution? This thing is making me insane.

Thanks in advance!

回答1:

For sending data to widget you can use it's constructor

String result = await Navigator.of(context).push(MaterialPageRoute(builder: (context) => SecondWidget("String")));

In this case result is new string, which will be returned from SecondWidget

class SecondWidget extends StatefulWidget {
  SecondWidget(this.text);
  final String text;

And somewhere in SecondWidgetState:

Navigator.pop(context, "New string");

This will close SecondWidget and return value for result I think it's clear enough and it'll help

UPD How to do in your case (something like this)

Profile profile = await Navigator.of(context).push(MaterialPageRoute(builder: (context) => LoginWidget()));
if (profile != null) Navigator.of(context).push(MaterialPageRoute(builder: (context) => MainWidget(profile)));

In LoginWidget:

void _afterLogIn() {
  // do something
  Navigator.pop(context, this.receivedProfile);
}

In MainWidget:

class MainWidget extends StatefulWidget {
  MainWidget(this.profile);
  Profile profile;